Release of troponin evaluated by the peak of troponin during the hospital phase.Because of its sensitivity and specificity as well as its widespread use in routine practice, rise in troponin levels is the main assessment criteria of this study. We plan to demonstrate a significantly altered distribution of the troponin release as evaluated by the peak of troponin for each patient during the hospitalization period (from randomization to cardiologic unit discharge), in the two arms of the trial.